Fire alarm



C. H. FINK FIRE ALARM Sept. 9, 1952 2 SHEETS-SHEET 1 Filed May 5, 1950v. 5 N I.

Charles H. Fink INVENTOR.

BY 4 am C. H. FINK FIRE ALARM Sept. 9, 1952 2 SHEETS-SHEET 2 Filed May5, 1950 Fig. 8

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Charles H. Fink INVENTOR.

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Patented Sept. 9, 1952 UNITED? STATES PATENT OFFICE Charles H. Fink,Midland, Tex.

Application May 5, 1950, Serial No. 160,143

This invention relates to signalling devices, and more particularly to atemperatureresponsive fire alarm.

An object of this invention is to provide a fire alarm having means foractuating an audible signal in response to subjection to a predeterminedcritical temperature, whichzmay vary over a wide range. V

A further object of this invention residesin the provision of a firealarm which has means for setting the fire alarm at a given temperatureat which the audible signal thereof will be actuated.

A still further object of the invention resides in the provision of afire alarm having means included therein for determining whether or notthe spring activated means for sounding the alarm is properly wound ornot.

Still another object of the invention resides in the provision of a firealarm having a suitable arm with indicia thereon so as to provideinformation as to the temperature at which the alarm will becomeactuated.

Still further objects of the invention reside in the provision of a firealarm that is strong, durable, highly efficient in operation, simple inconstruction and design, capable of being encased in a highly attractivecasing, capable of being manufactured from readily available parts, andwhich device will be comparatively inexpensive.

These, together with the various ancillary objects of the invention willbecome apparent as the following description proceeds, are attained bythis fire alarm, a preferred embodiment of which has been illustrated inthe accompanying drawings, by way of example only, wherein:

Figure 1 is a perspective view showing the fire alarm comprising thepresent invention;

Figure 2 is an enlarged side elevational view of the device comprisingthe present invention with the casing thereof being shown in section toshow the other parts in greater detail;

Figure 3 is a vertical sectional view as taken along line 33 ,in Figure"2;

Figure 4 is a vertical sectional View as taken along line 44 in Figure3;

Figure 5 is a horizontal sectional view as taken along line 5-5 inFigureZ;

Figure 6 is a sectional detail as taken along line 6-5 in Figure 3;

Figure '7 is another vertical sectional view as taken along line 1-1 inFigure 2; and

Figure 8 is a sectional detail of one element of the present invention.

Reference numeral l0 designates a casing of 3 Claims. (01. 116- 102)ornamentalconfiguration having slots or apertures 12 therein in orderthat heat may pass to the. working elementsof the fire alarm so as toimpart the temperature of theroom or space in which the fire alarm'islocated torthese working elements. Secured. within-the casing H1 is aframe M of any suitable design on which the various elements of theinventionmay be readily emplaced. There is also secured to the casme Illlugs lfiwhich are provided with suitable apertures 18 to enablethedevice to be readily secured to a wall or other surface, thuspermitsecured to the shaft 30 is a gear ,32 which is actuated by thegear 34 mountedon the drive shaft 36. A coiled spring 38 is held at oneend of frame [4 while its inner end is connected with the shaft 36. Akey' lll is mounted on the end of the shaft 36 for winding the spring33, and a pawl and ratchet holds the spring 38 in a wound position.

For preventing the striker 22 from actuating and sounding the, alarm 20,a rod 42 having a knurled head thereon is provided which has a hookportion 44 for engagement with the striker 22 so as to prevent it fromstriking the bell 20. Positioned on the rod 42 is a collar 46 which isengaged by an inwardly turned lug of a trigger 48. The trigger 48 iscarried by a plate {it so cured to the frame having suitable guideflanges with apertures therein, as indicated at 52. A spring 54 isWelded at one end to the frame and continuously urges the trigger 48into engagement with a temperature-responsive bellows 56 which isadjustably secured to the frame by means of a threaded shaft or rod 58,A disk 69 is secured to the rod 58, as is a knurled head 62 for rotatingthe rod. The disk Bil is adapted to be used in conjunction with the arm64 which has suitable indicia of temperatures thereon calibrated to thetemperature at which the bellows 56 will cause the trigger 48 to urge,by engagement with the collar 46, the release of the striker 22, whichwill then sound the bell 26. A groove is formed in the rod .42, as isindicated at 56, so that a pointer 63 can be used to indicate whether ornot the rod 42 is in position to engage the striker or not; Obviously,upon rotation of the knob 62 and hence the shaft 58 the the outer loopof the spring 38, and hence moves with it according to the amount ofte'nsionthereon. As the spring is unwound, it will slip off to the side,thus indicating that it should be wound. Further, an additional apertureM is formed in the side of the casing It in order that a free end 16 ofthe trigger 48 will extend therethrough so as to indicate the positionof the trigger 48.

There is provided an eye 10 on the casing through which a wire, stringor thread may run which is attached to the member 48 which extendsthrough the casing it. The wire, thread or string may be connected to? adoor, window, etc. The alarm will then be sounded if the door or windowis opened. This will in no w'ay interfere with the alarm settings forfi're.

However, since numerous modifications will readily occur to thoseskilled in the art after a consideration of the foregoing specificationand accompanying drawings, it is not intended to limit the invention tothe precise embodiment shown and described, but all suitablemodifications and equivalents may be readily resorted to which fallwithin the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A fire alarm device comprising a portable casing provided with slots,a frame within said casing, signal means secured to said frame,including a movable signal producing member, spring activated meansmounted on said frame for actuating said signal producing member,locking means for said signal producing mem ber, a thermostatic bellowsconsisting of elastic, disk shaped plates mounted for expansion in anaxial direction, a rockable trigger member controlling said lockingmeans, a flanged guide member for journaling and rockably holding saidtrigger member, supported by said frame, said trigger member having asection forming an axle rockable within said guide member, a furthersection of said trigger member extending at an angle thereto andprojecting towards the bellows and being substantially parallel to andin operative near contact with the. central side portion of the diskshaped bellows so that said trigger member is rocked upon apredetermined axial expansion of the bellows, a further section of saidtrigger member forming an end section projecting at an angle from thefirst named section of the trigger member and forming a lug, and afurther section of the trigger member projecting from the sectionparallel to the bellows beyond the frame and outwardlythrough one of theslots of the casing, a collar on said movable locking member, beingengaged by the end section of the trigger member forming a projectinglug, an adjusting means for positioning said bellows relatively to saidframe andrelatively to the trigger section parallel to the disks of thebellows to keep the bellowsout of contact with the trigger section untila predetermined temperature has been reached, said adjusting meansincluding a shaft threadedly engaging said frame, said bellows beingsecured to the shaft at one end thereof, spring means for urging thesection of said trigger member closest to the bellows into a position inwhich it is reached by said bellows upon a predetermined expansionthereof, indicating means operatively connected with said trigger memberand projecting through one of the slots of the casing, means carried bythe frame engaging said spring activating means and indicating thecondition of winding of said means, said means being further providedwith an indicator, projecting through one of the slots of the casing toindicate the condition of said spring activating means on the outside, ashield having indicia thereon secured to said frame and a disk carriedby the shaft threadedly engaging said frame at right angles to saidindicia carrying shield for indicating the adjustment of the bellows.

' 2. A fire alarm device comprising a portable casing provided withslots, a frame within said casing, signal means secured to said frame,including a movable signal producing member, spring activated meansmounted'on said frame for actuating said signal producing member, anaxially movable locking member provided with a transverse lockingprojection, the latter engaging and locking said movable signalproducing member, and adapted to lock and to release the last-namedmember upon being shifted axialsaid locking member having a sectionproj'ecting outwardly from said casing, manual means on the saidprojecting section for shifting said axially movable locking member, acollar on said axially movable locking member, a thermostatic bellowsconsisting of elastic disk shaped plates mounted for expansion in anaxial direction, a rockable trigger member for controlling said lock-ingmeans, a flanged guide member for journaling and rockably holding saidtrigger member, said trigger member having a section forming an axlerockable within said guide member, a further section extending at anangle thereto and projecting towards the bellows, substantially parallelto and in operative near contact with the central portion of the diskshaped bellows, so that said trigger member is rocked upon apredetermined axial expansion of the bellows, a further section of saidtrigger forming an end section projecting at an angle from the firstnamed section and forming a lug, a still further section of the triggermember projecting from the section parallel to the bellows beyond theframe and outwardly through one of the slots of the casing, said lastnamed section being attachable to objects moved upon intrusion into aroom, thus adapting the trigger member for use in a burglar alarm, acollar on said movable locking member, being engaged by the end sectionof said trigger forming a projecting lug, an adjusting means forpositioning said bellows relatively to said frame and parallel triggersection, so as to keep the bellows out of contact with the paralleltrigger section until a predetermined temperature has been reached, saidadjusting means. including a shaft threadedly engaging said frame, saidbellows being secured to the shaft at one end thereof, and means forurging said trigger into its end position closest to said bellows.

3. A fire alarm device comprising a portable casing provided with slots,a frame within the casing, signal means secured to said frame, includinga movable signal producing member, spring activated means mounted on theframe for actuating said signal producing member, an

5 axially movable locking member provided with a transverse projection,the latter engaging and locking said movable signal producing member,said locking member being adapted to lock and to release the last-namedmember upon being shifted axially and said locking member having furthera section projecting outwardly from said casing, manual means on saidoutwardly projecting section for shifting the movable looking member, acollar on said movable locking means, an indicator mark on the outwardlyprojecting section of the axially movable member, a pointing member onthe outside of said casing for cooperating with said indicator mark, athermostatic bellows consisting of elastic disk shaped plates mounted onsaid frame for expansion in an axial direction, a rockable triggermember controlling said locking means, a flanged guide member forjournaling and rockably holding said trigger member, supported by theframe, said trigger member having a section forming an axle rockablewithin said guide member, a further section extending at an anglethereto and projecting towards the bellows and being substantiallyparallel to and in operative near contact with the central portion ofthe disk shaped bellows, so that said trigger member is rocked upon apredetermined axial expansion of the bellows, a further section of saidtrigger member forming the end section projecting at an angle from thefirst named section of the trigger member and forming a projecting lug,and a further section projecting from the section parallel to thebellows outwardly through one of the slots of the casing, said sectionbeing attachable to objects moved upon intrusion, so as to adapt thetrigger member for operation in connection with a burglar alarm, acollar on said movable locking member being engaged by the end sectionof said trigger forming a projecting lug, an

6 indicator mark on the outwardly projecting sction of said axiallymovable locking membena pointing member on the outside of said casingfor cooperating with said indicator mark, an adjusting means forpositioning said bellows relatively to the frame and parallel triggersection, so as to keep the bellows out of contact with the paralleltrigger section until a predetermined temperature is reached, saidadjusting means including a shaft threadedly engaging said frame, saidbellows being secured to said shaft at one end thereof, spring means forurging said trigger member into its end position closest to saidbellows, indicating means operatively connected with said trigger andprojecting through one of the slots of the casing, means carried by theframe engaging said spring activating means and indicating the positionof winding of said means, said means being provided with an indicatorprojecting through one of the slots of the casing to indicate thecondition of said spring actuating means on the outside, a shield havingindicia thereon secured to said frame, and a disk carried by the shaftthreadedly engaging said frame at right angles to said inidcia carryingshield for indicating the adjustment of the bellows. CHARLES H. PINK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 926,277 Mielke June 29, 19091,009,926 Nesbit Nov. 28, 1911 1,200,103 Hartley Oct. 3, 1916 1,262,261Roys Apr. 9, 1918 1,369,427 Hartley Feb. 22, 1921 1,380,009 Overmyer May31, 1921

